Re: [avr-chat] ATMega 645 USART problem.

[Marc Moreau]

After much trial and frustration I found the problem.  The clk/8 fuse is 
programmed by default in 325/645.  After reading the documentation in that 
section multiple times I discovered the odd default.
All is well now.

Thanks for the verification.

-Marc

On Tue, 17 Apr 2007 23:42:41 +0200 (MET DST)
address@hidden (Joerg Wunsch) wrote:

> Marc Moreau <address@hidden> wrote:
> 
> > I'd like a verification that this doesn't work with the atmega645.
> 
> Don't have an ATmega645 around but only an ATmega6490, but they should
> have the same register structure (minus the LCD controller which the
> '645 obviously lacks).  As I didn't have a reliable 14.xx MHz clock
> source around on my STK504, I used the internal clock of 8 MHz, and
> thus had to decrease the baud rate to 38400 Bd in order to maintain a
> tolerable baud rate error.
> 
> Given that, everything works as you wrote it though.  Well, your test
> program lacks the initialization of port B for output to drive the
> LEDs (or whatever).
> 
> -- 
> cheers, J"org               .-.-.   --... ...--   -.. .  DL8DTL
> 
> http://www.sax.de/~joerg/                        NIC: JW11-RIPE
> Never trust an operating system you don't have sources for. ;-)
> 
> 
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